In February I started taking Concerta. First two weeks 18mg, then up to 36mg. I took 36mg (2 18mg pills) for like month and a half until the dr. changed my prescription to 1 36mg pill. I had some side effects that passed quickly and it worked perfectly until the start of May more or less. Now I don’t feel like it’s working ? I’m having trouble focusing again and my motivation is starting to fade. Is it time to go up to 54mg?

Also, I don’t know if anxiety could be a factor for it to not be working (though i take effexor for my anxiety). I have my uni entrance exams the first week of June, so for the medication to stop working now it’s not convenient at all lol. Should I take a break this weekend and see if on Monday it works again or call my GP to talk about getting a higher a dose?